Swinging link arrangement for railway trucks



Noy. 8, 1932. L. J. DAVBS SWINGING LINK ARRANGEMENT FOR RAILWAY TRUCKS 3Sheets-Sheet Filed March 16, 1931 INVE'N'I'OR .LE/V/J' J. DHV/f.

:BY myw.

ATTORNEY? Nov. 8, v1932.

L. ,1 DAVIS SWINGING LINK ARRANGEMENT FOR RAILWAY TRUCKS F ed March 16.18251 3 Sheets-Sheet 2 mvEN'roR 45M; J. 24W:

" ATTORNEY? Nov. 8, 1932. L. J. DAY/is 1,886,533

SWINGING LINK ARRANGEMENT FOR RAILWAY TRUCKS Filed March 16., 19:51"- 3Sheets-Sheet 3' INVENTOR m LEW/ .1 J. DAV/s.

N M -M4. v m

Q "w ATTORNEYS Patented Nev. 8.1932

' UNITED STATES LEWIS .r. DAVIS, or cmcimta'rr, omo, ASSIGNOETO 'rnnorivbmna'rr can oonroaa- TION, or cmomnarr, 01110, A oonromrron or omoSWINGING LINK ARRANGEMENT FOR RAILWAY Application tiled March 18, 1981.Serla1 No.-522,945.

This invention relates to improvements in swinging link arrangements forrailway trucks, and has for its object to provide means to dampen andlessen theside movement of car bodies while running.

It is also an object of this invention to provide means for cushioningthe up and down movement of the body on the supporting trucks or runninggear.

It is also an object of this invention to provide means for supporting acar body on .the trucks so that side movement is counteracted by thedownward movement of the weight of the body.

is It is especially the object of this invention to provide meanswherebythe lateral and vertical movementsof'the car bod ened and controlled oneby the ot er.

' These and other advantages will appear an from the-followingdescription taken in connection with the drawings, in which vthere isshown a preferred embodiment of this invention. L 1

Referring to the drawings:

Figure 1 is a top plan view of one end of a car truck.

Figure 2 is aside elevation of a truck with i a part thereof brokenaway.

.Figure' 3 is a section on the line 3--3 of Fi ure 2.

igure 4 is a side elevation of alink struc ture for supporting one endof a spring attached to the bolster.

Figure 5 is atop structure shown in Figure 4, together with coil s ringsassociated therewith. I

In i ure 1 there is shown one side of a car truck, t e frame 'of. whichis indicated by the numeral 1. This frame is supported by an axle 2 andwheels 3. There are two axles and four wheels for each frame. The frameand wheel structures are of the conventional form and a detaileddescription thereof will 7 not be given here. T The bolster 4 extendsacross thecentral part of the frame, between the axles-2, and issupported as hereinafter described. 7 In the center of this bolster isprovided a seat 5 for supporting one end of the car body, not shown. Inthe central part of this seat and are less plan View of the linkextending through a boss therein is-a hole 6 for receiving a pin forholding-the car body PATENT 'orrl'cs on the bolster. Attached to thebolster adjacent the'seat 5 is a bracket 7, which provides a seat 8havinga cushion 9 therein. In the central part of this cushion is a hole10. The

seat 8 is of any suitable form and shape and is adapted to hold thecushion 9 against longitudinal movement.

This bracket and the cushion supported thereby are to support one end ofa semielliptical spring 11 which has on each end a plate 12 suitablyattached thereto. On each plateand extending downwardly therefrom I I sa lug 13 to fit in the hole 10 in the cushion 9, so that when the end ofthe 's ring is properly placed upon the pad or one ion the spring cannotmove longitudinally with relation to the bolster. Around the centralpart of the spring is a sleeve 14. This sleeve as suitably attachedthereto the lower part 15 of a housing. The upper and cooperatingpart ofthis housing is indicated by the numeral 16 and is attached to thebolster a short distance'from'the end thereof. These two partsconstitute a housing for containinga resilient member 17. This resilientmember is made of rubber or any suitable materialpand supports, the endof the bolster on the spring in a resilient manner.

. Extending from the frame 1 is 'abracket 18, which has in the outer endthereof a curved seat 19. In. this. curved-seat is a curved wearingplate 20, which provides a seat for a bolt 21. On each end of this boltis a link 22. These two links constitute the upper pair of 1' ks forsupporting the end of the spring op osite that supported on the bracket7. The links of-the other pair are indicated by the numeral 23. One linkof the upper pair of links is on each side of the bracket 18 andswingsvertically downwardly therefrom. The lower pair of links isattached to the upper pair of links by Resting on tlfis'bolt25 betweenthe 23 is a saddle 26 which has on the lower part By this arrangementthe saddle is supported between the lower links and upon the bolt 25. Onthe side of the saddle opposite the seat 27'is a second seat 29, similarin shape to seat 8. This seat carries a cushion 30, which is similar tothe cushion 9 and has a hole 31 therein for receiving the lug '13 on theend of the spring opposite that supported by the bracket 7 The trunnionbetween thelinks has a pair of horizontally arranged holes 32 therein,each to receive one end of a spring. Fitting over the outer ends ofthese holesand against the trunnion is a cover plate 33, which is heldthereto by means of bolts or screws 34. In each of the holes 32 is oneend of a spring 35. The other ends of these springs rest against'abracket 36 attachedto the end of the bolster 4. This bracket is providedwith a pair of studs 37 which project into the ends of the springs tohold the springs in position between the links and the end of thebolster.

It will be noticed from an examination of Figure 3 that the end of thespring adjacent the bracket 36 is elevated above the ends of the springsfitting in the trunnion. By this means when a load is applied to thebody mounted upon the bolster the bolster tends to lower and therebycompress the spring 35 and cause the links to swing outwardly at theirpoints of connection with each other.

If any force should be applied to the side of the body in the directionof the arrow X, the bolster will move toward the left as shown in Fi e3. This left-hand movement of the bolster tends to move the links attheir pivot point on the trunnion; This motion causes the links 22 toswing to the left from the line BB to the line CC. When the links 22have the direction CC the downward pressure on the bolster and the forceexerted by the springs 35 are equal to the force in the direction of thearrow X. These forces tend to reduce the lateral move ment of thebolster. A downward movement of the bolster and the car body supportedthereby tends to compress the springs 35 and move the link structure outand thereby raise the bolster and the body supported the lateralmovements are dampened and lessened. In Figure 3 the line BB indicatesthenormal direction of the links 22;

When force is applied in the direction of the arrow X this link iscaused to swing so that it will assume the position of the line (3-0.When the links 22 are in the direction of the line C-C the weight of thebody on the spring tends to straighten these links and bring them backso they are in their normal position, thereby forcing the bolster 4 bakto its normal position.

At the time the bolster, as shown in Figure 3, is receiving its lefthandlateral movement the links 22 at the other end of the bolster, not hereshown, are caused to swing inwardly and in this position these linkswill assume a position similar to thatshown in line AA of Figure 3. Thisline represents the extreme inward movement of the links 22. The line CCrepresents the extreme outer movement of the links 22 and the line BBrepresents their normal position.

In other words, any force tending to move the body sideways on the truck'will also move the pivotal center at the bottom of the link structure acorresponding distance and will move the point of engagement of the coilspring with the bolster in the same manner. spring to compress and exertpressure on the trunnion supporting the other end of the coil spring atthe junction of the two links. This will cause the top link to swing outfrom the angular position, which is the angle of the top link at rest.When it assumes the new position, the angularity of the forces such asthe lateral force on the bolster and the down- .ward force on thebolster, and the force ex- Such movements will cause the coil.

force, will equal each other. As a result, the

swing of the body is checked and through gravity and the force in thecoil spring, the truck bolster and body will swing back to centerposition.

This swing link arrangement is on both sides of the truck so that a bodymovement in either sideways direction will bechecked.

While the vehicle is running, the coil spring on each side of the truckis exerting a certain pressure, tending to steady the body against minormovements. As the .links are suspended at an angle in relation to oneanother, any increased pressure about the pivotal connection of thelinks to the bolster through the leaf spring, due to vertical car bodymovement, will tend to straighten this angle and will bring the coilspring into action with a cushioning efl'ect on the vertical move-' mentof the body.

I desire to comprehend within my invention such modifications as may beembraced within my claims and the scope of my invention.

Having thus fully described my invention, what I claim as new and desireto secure by Letters Patent, is:

.1, In a railway truck, a frame, a bolster, a

to retard the movement of'the bolster:

- 3. In a railway truck, a frame, a bolster, a

supporting member extendinggfrom beneath porting the other end each endof said bolster, link means between each supporting member and theframe, and means connected to each link means and engaging the end ofthe bolster to retard the and each spring to support the bolster, and

spring means between each link means and the end of the bolster toretard the movement of the bolster.

5. In a railway truck, a frame, a bolster,

and means for supporting each end of the holster on the frame, saidmeans comprising a link structure, a spring for supporting the bolsteron the link structure and a spring acting upon the bolster and the linkstructure to retard the lateral movement of the bolster.

6. In a railway truck, a frame, a bolster, and means for supporting eachend of the bolster on the frame, said means comprising a link structure,a spring for supporting the holster on the link structure and a springconnected atone end to the link structure and engaging the end of thebolster to retard the lateral movement of the bolster.

7. In a railway-truck, a frame, a bolster, a

leaf spring attached at one end to one end of the bolster, a linksupported at one end by the frame, a second link pivoted to thefirstnamed link and supporting the. other end of the spring, and aconnection between said links and the bolster to retard the lateralmovement of the bolster.

8. In a railway truck, a frame, a bolster, a leaf spring attached at oneend to one end of the bolster, a pair of links supported at one end bythe frame, a second pair of links pivoted to the first-named pair oflinks and supporting the other end of the spring,-and a connectionbetween said links and the holster to retard the lateral movement of thebolster. 9. In a railway truck, a frame, a holster; a leaf springattached at one end to one end of the bolster, a pair of links supportedat one end of the frame, a second pairof links pivoted to the firstnamed pair of links and sup- 0 the spring, and a coil spring betweensaid links and the end of the bolsterto retard the lateral movement ofthe bolster.

10. In a railwa truck, a frame, a bolster, a leaf spring attao ed at oneend to one end of movement of the holster.

the bolster, a pair of links supported at one end b the frame, a secondpair of links connected at 1 one end to the other end of the spring, atrunnion member connecting the other ends of both pairs of links, andmeans between the trunnion member and the bolster to retard the lateralmovement of the bolster.-

11. In arailway truck, a frame, a bolster, a leaf spring attached at oneend to one end of the bolster, a pair of links supported at one end bthe frame, a second pair of links connecte at one end to the other endof the spring, a trunnion member connecting the other ends of both pairsof links, and spring means between the trunnion member and the bolsterto retard the lateral movement of the bolster.

12. In a railway truck, a frame, a bolster, a leaf spring attached atone end to one end of the bolster, a pair of links pivoted at one end tothe frame, a second pair of links connected at .oneend to the other endof the spring, a trunnion member connecting the other ends of both pairsof links, and a coil spring between the trunnion member and the end ofthe bolster to retard the lateral movement of the holster i 13. In arailway truck, a frame, a bolster, a leaf spring attached at one end toone end of the bolster, a pair of links, a bolt connecting pair oflinks, a boltconnecting one end of each of the last named links to theother end of the spring, a trunnion member connecting the other ends ofsaid links, said trunnion member. having a hole therein and a platethereon to provide a seat, and a coil spring having one end in the seatand the other end against the end of the holster to retard the lateralmovement of the bolster.

id. in a railway track, a frame having a bracket extending therefrom, abolster, a leaf spring attached at one end to one, end of the holster, apair of links, a it connecting one end of each link to the bracket, asecond pair of links, a bolt connecting one end of each of thelast-named links to the other endof thespring, a trunnion memberconnecting the other ends of said links, said trunnion member havingapair of holes therein and a plate thereon to provide seats, and a pairof coil springs, one end of each spring being in one of said seats andthe other end of each spring engaging the holster to retard the lateralmovement of the holster.

15, In a railway truck, a frame having a bracket extending therefrom, abolster having a bracket thereon, a semi-elliptical spring supported atone endby said last nained hracket'and enga ing the bolster adjacent itsend, a jointed lin supporting the other end of said spring from saidfirst-named bracket, and. means between the end of the bolster and saidjointedlink to retard the lateral 95- one end of each link to the frame,a second I are 16. In a railway truck, a framehaving a bracket extendingtherefrom, a bolster having a bracket thereon, a semi-elliptical springsupported at one end of said last-named bracket and engaging the bolsteradjacent its end, a jointed link supporting the other end of saidspringfrom said first-named bracket,

end, a jointed link supporting the other end of said spring from saidfirst-named bracket,

and a coil spring between the end of the bolster and said jointed linkto retard the lateral movement of the bolster, the end of said coilspring adjacent the bolster being slightly more elevated than the otherend.

18. In a railway truck, a frame having a bracket extending therefrom, abolster having. a downwardly extending bracket thereon, a pad in saidlast-named bracket, a semi-elliptical spring supported at one end onsaid pad, means between the ends of said spring and the end of thebolster to support the bolster on the spring, a jointed link supportingthe other end of the spring on the first-named bracket, and resilientmeans between the end of the bolster and the jointed link to retardlateral movement of the bolster.

19. In a railway truck, a frame having a bracket extending laterallytherefrom, a bolster having a downwardly extending bracket thereonforming a seat, a pad member in said seat, a semi-elliptical springsupported at one end by said pad and supporting the end of the bolster,a pair of link members supported by the first-named bracket, a secondpair of link members supporting the other end of said spring, a trunnionmember. uniting said pairs of links, said trunnion member having seatstherein, coil springs having one of their ends in said seats, and meanson the end of the bolster to support the other ends of said sprin namedend to dampen the lateral movement of the bolster.

20. In a railway truck, a frame having a laterally extending bracketthereon, a. bolster seat, a pad member in said seat, a sprin havhaving aresilient pad member adjacent one end, a bracket 'on said bolsterproviding a mg one end supported by said secon pad member and its middlepoint engaging said first pad member, a pair of link members supportedby said first bracket, a second pair of link members adapted to engageunder the spring member to support the other end thereof, a trunnionuniting the ends of sa d palrs of-link members, a pair of seats in saidtrunnion, coil springs having one of their ends in said seats, and meanson the end of the bolster to support the other ends of said springsslightly more elevated than the first ends to dampen the lateralmovement of the bolster.

21. In a truck, a bolster carrying a body, a frame, angularly arrangedpivoted links pivoted on the frame and to the bolster, a

bolster supporting leaf spring between the bolster and the links, and adampening spring interposed between the bolster and the angularlarranged links, said links being'normal y arranged at an angle to oneanother whereby vertical and lateral movements of the bolster will berestrained and dampened.

22. In combination, side frames, a floating bolster therebetween,angularl disposed links pivoted on one another on eit er end of saidbolster, theupper half of the links being pivoted on the frame, leafsprings beneath the ends of the bolster havin their centers and innerends connected to t e bolster and their outer ends mounted on the lowerlinks, coil springs interposed between the ends of the bolster and theconnections of said links.

23. In a vehicle truck, a frame, a bolster,

slow acting leaf springs supporting'said bolster on said frame, andquick acting coil springs arranged between said frame and bolster todampen. vertical and side movements of said bolster.

.24. In a vehicle truck, a frame, a bolster, slow acting leaf springssupporting said bolster on said frame, and quick acting coil springsarranged between said frame and bolster to dampen vertical andsidemovements of said bolster, and leverage means be tween said bolster andquick acting coil springs on one hand and said frame on the otherwhereby the action upon the coil springs of the movements of saidbolster vertically and laterally will be amplified upon Lewis J. DAVIS;

s in a position normally above the first-

